French buttercream, German Buttercream, Russian Buttercream, and Korean Buttercream. Buttercream, in its most simple form, is a mixture of butter and sugar that has been creamed together to make a fluffy frosting. Buttercream is used for filling, icing, and decorating cakes and pastries. It is no surprise that the fat in buttercream is typically all butter, which is where american buttercream name comes from.
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